Cylindrical drier



Sept. 13, 1927' C, H. CROWELL cLINDRIcAL DRIER- Sept. 1.3, 1927.

c. H. cRowELL YLINDRICAL DRIER Filedqan.. 1o, 1925' 2 meets-Sheet 2.

. INVENTOR CHARL E5 /l CHOWE/.L

ATTORNEY .l1mm-sepelj'ls';1921. j I 1,642,361

UNITED STATES.. PATENT OFFICE.

l ,cnnusnucnowunorwmxrmgmygngl l l Appunti ma :muri-1o, im. arm n.1,510;

This invention' relates to driers of the sure Afluid. .A shallow annularpasdrum ty and particularly to the of large sage 5 is therefore` rovidedin the periphsize, suc as six feet or more in diameter. eral portionofthe rier between inner and f Thom lnrannrinra am mivn"huw-uvm:Ynlrnnnr annular malla R '7 t flanges of the heads.' Packing rings 27which may be of sectional or continuous construction. may then beboltedon over the joints at the sides of the drum.

The inside shell ma be made of steel shrunk onto the heads, ut theoutside shell -ispreferably made of a material such as copper, zinc orthe like having good heat radiating characteristics, non-corrosive andossessin all the strength necessary' to withstan the high rassure. Theskeletom. ized construction o the drum enables the lining of the innerwall and the covering of the piping with heat insulating material, ifthat be found desirable, 4and the non corrosive character of theouterwall assures continuance of yefficient heat radiation.

Because of the eiiicient transfer o f heat provided from the drum tothe'material under. treatment, .it is only necessary to` provide forescape of the water of zcondensation. Accordingly, one or a number ofoutlet valves are provided, these consisting in the illustration, ineach instance .of a valve normally held closed, but adapted 'to openautomatlcally at the lowest point in the revolution of the drum, todrain the purpom. I g y One hub of the drying cylinder 1s shown v watercontents. 4

In Figure 3. a preferred construction of such valvesy is illustrated,the same being shown as consisting of a yalve casing or chamber 28 xedto the end of the drum and open to the peripheral steam chamber byapassage 29, said casingcontaining a valve 30 cooperating with a valveseat 31 screwed into the bottom of the casing and opening to anoutwardly angled discharge spout 32. The valve is normally held closed-by a spring 33 surrounding the stem 34 of the valve, which stem passesup through a suitable stulling box 35 and-is connected at 36 with a yoke37 slidably guided in bearings 38 at the 'sides of the valve casing andcarrying at the lower end ofthe same, a\roller 39 for cooperation with atrack 40. This valve opening track is shown as supported at oppositeends on screw posts 41 which can e turned by worm gears 42 engaged byWorms 43 on shaft 44. This shaft is shown as equipped with a suitablehand wheel 45 conveniently accessible at theront of the machine andinorder that thevalve opening tracks at both sides of the machine ia' besimultaneously adjusted, the' shafts are shown as connected to turn inunison. bg bevelgearing 4G and a cross connecting s aft 47.' Y z I Thevalve opening cams or .tracks 40 are -so shaped as'to open and hold thevalves. open for a sullicient time for complete drainage of thecondensation and the adjustment Y provided enables the valves being setto close in time to prevent'any loss -of live steam. At each end thetracks ma "De` v` beveled ornclined asl `indicated to insure positiveopening and closing of the valves. As shown in Figure 3 the valvecasing, as it reaches the lowest point of travel, forms in effect a wellto collect the drainage from. the chamber and as the passage 29 is ofthe full de th of the chamber, the liquid contentsdra iiV out withoutany obstruction. Only two of 'the-outlet valves areindicated and itis tobe understood from this that as many of these may be providedl as 'isfound necessary, located at one or both ends of the cylinder anddisposed either directly opposite or in stag ered relation.

To prevent the entry of ive steam from interfering with the drainageaction, means are shown in the form of a shut-oi valve 49 for closingthe entrances to the steam supply pipes 22 as these ap roach and travelthrough the lower arc o movement.. Where the steam isentered at bothhubs, as the illustration, two`of such valves are provided, each shownas having an .arcuate valve face -and sup tionary relation within theollow-hub by a rod 50 having a head 51 exposed outside 'the end c'ap ofthe vbearing f or adjustment to' respond equipped with a sprocket gear52 en by a driving chain 53. The dryin operations may be governed byvarying t e speed of rotation, the pressure and the volume of steamadmitted. A certain amount of control also is given by re lating theopenin of the outlet valves. T e apparatus is qui to these variouscontrols, particularly so because of the fact that the high pressuresteam is confined in a thin Vor shallow layer and thereforemosteffective to 've u all its heat. Because of the relative y sma l volumeof steam carried'and the simple, sturdy construction, 'practically alldanger is eliminated. The automatic closing of the steam inlets as theyapproach the downward arc, prevents live steam from', blowing out withthe water of condensation, portion of the but the pressure inthe upcylinder is eiective to ush out all condensation each time one of thevalves opens.

Injury of sudden expansion or contraction is avoided in the constructiondisclosed. The supply pipes with the angular 'ortions therein can yieldone way or the ot er and the automatically o nin exhaust valves save thewalls of the romin'ury which might otherwise result from suden'expansion or contraction' following admission or cutting off the highpressure steam.

While I have shown and described and have pointed out in theannexedclaims certain novel features of my invention, it will be understood.that various omissions, subatitu'tions` and'changes in thev forms-anddetails of the device illustrated and in itsoperation may be made bythose skilled: in the rtedinstart without departing from' the spirit ofmy invention.

What is claimed is: 1. A dryin cylinder having a shallow annular cham rfor high` ressurelsteam in theperi heral portion of t e same andprovided with a valve automatically opening at the lowest point in thetravel of the cylinder 'l to 'drainthe condensation from the-shallowperipheral steam chamber and means for .shutting olf supply of steam tothe lowerportion of the cylinder during the period that the dirvalve isol. h i l h-u 2. ryin c in er 'aving vs a ow annular cham ryfor highsteam in the peripheral .portion of the same and provided with a valveautomatically o nin at the lowest point in the travel of t e cy in derto drain the" condensation from the shallow peripheral steam chamberandadjustable means for regulating the opening` of the drainage valve.

3. A rotary drier comprising end heads, an annular. shell supported onsaid heads, -anouter annular she Vposed between the two s ells, clamrings engaged about the outer shell and en 'plates secured in positioncovering the joints beof the hollow hubs and bearings for .the hubshavin steam chambers open tothe same.`

` condensation, said valve .havi

tween the end heads, inner shell, spacer rings,

outershell and clamp rings.

'4. Arotary drier comprisi vwith hollow hubs, a stub sha and 'headsentered `in the-opposed ends of the hollow hubs, closing d 'the' innerends of the same and'supporting the.- heads in spaced relation, anemular peri heral.. steam chamber carried by tl iel hea andconnectedwith lthe openportions 'drier havinga 'peripheral steam chamberlprovided wlth' a valve for ventin an expose operating member andatracfor -engag-i mentby said memberfadiustably supported inI the lowerarcoftravel ofthe drier.

6; A rotary drier .having4 a peripheral steam.. chamber provided withv'a drainage valve, `adjustablemeans for automatically opening said valvein` the A.rotationpf the drier. live Ito. theperipheral.

achamber and meansifor automatically clossaid as they approach thelower-'arc -o travel in. .the `rotat1 )nv of the v drierhavintg feralchamber4- v svi fa port opening yt the-sid'eof .the same, a valve chestwith said port; a valve 'chesband means-for i drier," f including anadjust le. wtlnsa'd abutment.

a 'fa rotary drier. a shallow periph-v l, acer rings intera'shallowperiph;

y loperatingsaidvalve in the' through the side of the same, a valvechest in communication with said port, a valve and valve seat in saidchest and'means for automatically operating saidvalve in the .rotationof the drier, said valve having a y stem projecting up through the topof the valve chest, a yoke connected with said stem and slidablysupported at the side of the chest and an abutment engageable by saidyoke in the rotation of the drier.

9.- A rotary drier a shallowv peripheral steam chamber wit a port.opening through the side-of the same, a valve Chest in communicationwith said port, avalve and valve seat in' said chest and means forautomatically operating saidvalve Ain the notation of the drier, saidvalve having a i stem projecting up through the 'top of the valve chesta yoke connected with -said stem and slidably supported at theo'sde l0fthe chest and .an abutment engaable b said yoke in the rotation of .theier an consisting of a track, the yoke carryinga pivoted roller to rideon said track. I

110.k A rotary' drier having a shallow peripheral steamchamber with 'aport openf i'ngthrough.` the side-.of the same, a valve I i .1ncommunication with said port, a

:.valve and valve seat in" said chest and means .for automaticallyoperating said valve in they rotation of the drier, said valve chest v a.laterally extending discharge outhaving Aletangled away; from the sideofthe drier toA receive the' e valve f dpots a vvalve 'and'valve seat insaid chest an means for automaticall 4o the rotation of je. rier, thevalve seat being carried by in the bottomof the valve chest.. y

12'. A` ro -d'rier -pxfovided'with a sha1-j with `said chamber`andjautomaticall openfor shuttin oif the'steam supply to of said periodof 4said, valve. 13. A 'er having a 'shallow peripheral big pressuresteam chamber,l

steam supplyconnections thereto, a condeu'- sationldlschargefyalvefconnected with chamber, `means for automaticall .openingsaidvalve in the rotation of chamber lasv .and for. automaticallyshutting.. of the: steam supply 1n the.rotation ofsaida'/y chamber'during the (mea-periodl of said eral "wi a port-opening 14. A Y

peripheral fluid chamber, a holow hub' for sup orting said 'chamber, a.benin for rotate 1y sup orting said hub and aving a Huid cham rcommunicating with the opening in said hub, supply pipes leading fromsaid hub to said chamber, a vave positioned in said hollow hubforopening and dosing said pipes by the rotation of said hub, said valvebeing mounted on said bearing".

In testimony whereof I have hereunto set my hand.

CHARLES H. CROWELL.

